My system is already on the car, once I drive it a little more I will give my impressions as they are a little different than what the other person has written about the exhaust.

Great, I'm very inerested to hear your thoughts. I'm going to put about 150 miles on mine today and see if it opens up a little.

Update As stated above I put about 150 mile on my car today and the Magnaflow has opened up quite a bit, there is significantly more sound character than when it was first installed, I have about 250 miles on the system. I'm sure hoping this continues!